[VOL-4291] Rw-core updates for gRPC migration
Change-Id: I8d5a554409115b29318089671ca4e1ab3fa98810
diff --git a/vendor/google.golang.org/protobuf/internal/impl/extension.go b/vendor/google.golang.org/protobuf/internal/impl/extension.go
new file mode 100644
index 0000000..e904fd9
--- /dev/null
+++ b/vendor/google.golang.org/protobuf/internal/impl/extension.go
@@ -0,0 +1,156 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package impl
+
+import (
+ "reflect"
+ "sync"
+ "sync/atomic"
+
+ pref "google.golang.org/protobuf/reflect/protoreflect"
+ piface "google.golang.org/protobuf/runtime/protoiface"
+)
+
+// ExtensionInfo implements ExtensionType.
+//
+// This type contains a number of exported fields for legacy compatibility.
+// The only non-deprecated use of this type is through the methods of the
+// ExtensionType interface.
+type ExtensionInfo struct {
+ // An ExtensionInfo may exist in several stages of initialization.
+ //
+ // extensionInfoUninitialized: Some or all of the legacy exported
+ // fields may be set, but none of the unexported fields have been
+ // initialized. This is the starting state for an ExtensionInfo
+ // in legacy generated code.
+ //
+ // extensionInfoDescInit: The desc field is set, but other unexported fields
+ // may not be initialized. Legacy exported fields may or may not be set.
+ // This is the starting state for an ExtensionInfo in newly generated code.
+ //
+ // extensionInfoFullInit: The ExtensionInfo is fully initialized.
+ // This state is only entered after lazy initialization is complete.
+ init uint32
+ mu sync.Mutex
+
+ goType reflect.Type
+ desc extensionTypeDescriptor
+ conv Converter
+ info *extensionFieldInfo // for fast-path method implementations
+
+ // ExtendedType is a typed nil-pointer to the parent message type that
+ // is being extended. It is possible for this to be unpopulated in v2
+ // since the message may no longer implement the MessageV1 interface.
+ //
+ // Deprecated: Use the ExtendedType method instead.
+ ExtendedType piface.MessageV1
+
+ // ExtensionType is the zero value of the extension type.
+ //
+ // For historical reasons, reflect.TypeOf(ExtensionType) and the
+ // type returned by InterfaceOf may not be identical.
+ //
+ // Deprecated: Use InterfaceOf(xt.Zero()) instead.
+ ExtensionType interface{}
+
+ // Field is the field number of the extension.
+ //
+ // Deprecated: Use the Descriptor().Number method instead.
+ Field int32
+
+ // Name is the fully qualified name of extension.
+ //
+ // Deprecated: Use the Descriptor().FullName method instead.
+ Name string
+
+ // Tag is the protobuf struct tag used in the v1 API.
+ //
+ // Deprecated: Do not use.
+ Tag string
+
+ // Filename is the proto filename in which the extension is defined.
+ //
+ // Deprecated: Use Descriptor().ParentFile().Path() instead.
+ Filename string
+}
+
+// Stages of initialization: See the ExtensionInfo.init field.
+const (
+ extensionInfoUninitialized = 0
+ extensionInfoDescInit = 1
+ extensionInfoFullInit = 2
+)
+
+func InitExtensionInfo(xi *ExtensionInfo, xd pref.ExtensionDescriptor, goType reflect.Type) {
+ xi.goType = goType
+ xi.desc = extensionTypeDescriptor{xd, xi}
+ xi.init = extensionInfoDescInit
+}
+
+func (xi *ExtensionInfo) New() pref.Value {
+ return xi.lazyInit().New()
+}
+func (xi *ExtensionInfo) Zero() pref.Value {
+ return xi.lazyInit().Zero()
+}
+func (xi *ExtensionInfo) ValueOf(v interface{}) pref.Value {
+ return xi.lazyInit().PBValueOf(reflect.ValueOf(v))
+}
+func (xi *ExtensionInfo) InterfaceOf(v pref.Value) interface{} {
+ return xi.lazyInit().GoValueOf(v).Interface()
+}
+func (xi *ExtensionInfo) IsValidValue(v pref.Value) bool {
+ return xi.lazyInit().IsValidPB(v)
+}
+func (xi *ExtensionInfo) IsValidInterface(v interface{}) bool {
+ return xi.lazyInit().IsValidGo(reflect.ValueOf(v))
+}
+func (xi *ExtensionInfo) TypeDescriptor() pref.ExtensionTypeDescriptor {
+ if atomic.LoadUint32(&xi.init) < extensionInfoDescInit {
+ xi.lazyInitSlow()
+ }
+ return &xi.desc
+}
+
+func (xi *ExtensionInfo) lazyInit() Converter {
+ if atomic.LoadUint32(&xi.init) < extensionInfoFullInit {
+ xi.lazyInitSlow()
+ }
+ return xi.conv
+}
+
+func (xi *ExtensionInfo) lazyInitSlow() {
+ xi.mu.Lock()
+ defer xi.mu.Unlock()
+
+ if xi.init == extensionInfoFullInit {
+ return
+ }
+ defer atomic.StoreUint32(&xi.init, extensionInfoFullInit)
+
+ if xi.desc.ExtensionDescriptor == nil {
+ xi.initFromLegacy()
+ }
+ if !xi.desc.ExtensionDescriptor.IsPlaceholder() {
+ if xi.ExtensionType == nil {
+ xi.initToLegacy()
+ }
+ xi.conv = NewConverter(xi.goType, xi.desc.ExtensionDescriptor)
+ xi.info = makeExtensionFieldInfo(xi.desc.ExtensionDescriptor)
+ xi.info.validation = newValidationInfo(xi.desc.ExtensionDescriptor, xi.goType)
+ }
+}
+
+type extensionTypeDescriptor struct {
+ pref.ExtensionDescriptor
+ xi *ExtensionInfo
+}
+
+func (xtd *extensionTypeDescriptor) Type() pref.ExtensionType {
+ return xtd.xi
+}
+func (xtd *extensionTypeDescriptor) Descriptor() pref.ExtensionDescriptor {
+ return xtd.ExtensionDescriptor
+}